PENNYMAC · 1 week ago
Principal Backend Engineer
LA Metro Area
Full-time
Onsite
Senior Level, Lead/Staff
$90K/yr - $150K/yrPennymac is a specialty financial services firm focused on the production and servicing of U.S. mortgage loans. The Principal Backend Engineer will architect and build core backend systems for an AI SDLC platform, working closely with other engineers to enhance developer productivity and tackle complex challenges in applied AI.
BankingFinanceFinancial ServicesLendingMortgage
Hiring Manager
Chiji O.
Responsibilities
Architect and build the core backend systems for the AI SDLC platform in a cloud-native (AWS) environment using Node.js and TypeScript
Design, implement, and scale the "Unified Context Library," our RAG (Retrieval-Augmented Generation) foundation. This includes ingesting and vectorizing vast amounts of institutional knowledge from sources like Confluence, Jira, and Gitlab
Develop robust orchestration flows for autonomous AI agents using frameworks like the AWS Bedrock AgentCore and LangChain.ts
Build and maintain secure, scalable APIs for deep, bi-directional integrations with third-party developer tools (e.g., GitLab, Jira, ServiceNow)
Engineer high-performance developer-focused services (e.g., Language Server Protocol-style backends) that can interact with code repositories, run linters, parse test results, and provide real-time feedback to AI agents
Collaborate in a highly agile, "internal startup" environment, working directly with product managers and fellow engineers to define, build, and rapidly iterate on new features based on user feedback
Take full ownership of the services you build, from architectural design and implementation to DevOps (IaC), testing, and production operations
Recommend and evaluate new technologies, architectures, and processes to ensure our AI platform is scalable, resilient, and cutting-edge
Qualification
Required
Architect and build the core backend systems for the AI SDLC platform in a cloud-native (AWS) environment using Node.js and TypeScript
Design, implement, and scale the 'Unified Context Library,' our RAG (Retrieval-Augmented Generation) foundation. This includes ingesting and vectorizing vast amounts of institutional knowledge from sources like Confluence, Jira, and Gitlab
Develop robust orchestration flows for autonomous AI agents using frameworks like the AWS Bedrock AgentCore and LangChain.ts
Build and maintain secure, scalable APIs for deep, bi-directional integrations with third-party developer tools (e.g., GitLab, Jira, ServiceNow)
Engineer high-performance developer-focused services (e.g., Language Server Protocol-style backends) that can interact with code repositories, run linters, parse test results, and provide real-time feedback to AI agents
Collaborate in a highly agile, 'internal startup' environment, working directly with product managers and fellow engineers to define, build, and rapidly iterate on new features based on user feedback
Take full ownership of the services you build, from architectural design and implementation to DevOps (IaC), testing, and production operations
Recommend and evaluate new technologies, architectures, and processes to ensure our AI platform is scalable, resilient, and cutting-edge
Benefits
Comprehensive Medical, Dental, and Vision
Paid Time Off Programs including vacation, holidays, illness, and parental leave
Wellness Programs, Employee Recognition Programs, and onsite gyms and cafe style dining (select locations)
Retirement benefits, life insurance, 401k match, and tuition reimbursement
Philanthropy Programs including matching gifts, volunteer grants, charitable grants and corporate sponsorships
Company
PENNYMAC
Pennymac is a home loan lending company that offers financial services.
Founded in 2008
1001-5000 employees
H1B Sponsorship
PENNYMAC has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (48)
2024 (42)
2023 (33)
2022 (44)
2021 (65)
2020 (34)
Funding
Current Stage
Public CompanyTotal Funding
$2.33B2025-12-11Post Ipo Debt· $75M
2025-08-07Post Ipo Debt· $650M
2024-05-20Post Ipo Debt· $850M
Leadership Team
Amar Nadig
Senior Vice President of Enterprise Data
Kevin Ryan
Senior Managing Director and Chief Strategy Officer
Recent News
MarketScreener
2025-12-20
2025-12-16
2025-11-06
Company data provided by crunchbase